BMW 1999-2005 M3 Service Manual page 1247

On-Board Diagnostics
BMW P-code
code
117 P1542
118 P0120
MS 42
MS 43
119 P1580
MS 42
MS 43
120 P1542
MS 42
MS 43
122 P1101
123 P1622
9 of 20
Fault type and Signal type and
function range
Pedal sensor Input analog
potentiometer (0-5V)
plausibility
Motor throttle Input analog
feedback (0-5V)
potentiometer
plausibility
Throttle position DME internal
sensor 1; values
plausibility check
sensor 1 to mass
air flow meter
MDK, throttle DME internal test
mechanical
sticking
Throttle position DME internal
sensor 2; values
plausibility check
sensor 1 to mass
air flow meter
Pedal sensor/ DME internal
motor throttle valve values logical
potentiometer not motor
plausible
Plausibility check Input digital /
between brake analog
switch and pedal
sensor
Oil temp. sensor Input analog
malfunction (0-5V)
Electric thermostat Output digital
control, final stage on/off (active low)
http://ebahn.bentleypublishers.com/BMW/3/E46/Repair%20Manuals/8...
Explanation
If there is a difference greater
than specified between two
redundant signals from
potentiometer, fault will be
set.
If there is a difference greater
than specified between two
redundant signals from
potentiometer, fault will be
set.
Signal range is checked
against predetermined
diagnostic limits. Rationality
check with mass air flow
meter.
Throttle doesn't reach desired
opening angle within a
specified time.
Signal range is checked
against predetermined
diagnostic limits. Rationality
check with mass air flow
meter.
Signal from motor throttle
valve potentiometer must be
equal signal from pedal
sensor potentiometer plus
any adaptive values.
Plausibility check between
constant pedal value and
brake switch. First pedal
value must be constant and
for next step brake switch
must be active.
Signal range is checked
against predefined diagnostic
limits and calculated
temperature.
DME final stage will set flag
whenever a short to ground, a
short to battery voltage or a
2/25/2009 11:23 PM